531216730 has 32 divisors (see below), whose sum is σ = 1045804608. Its totient is φ = 192672000.

The previous prime is 531216727. The next prime is 531216757. The reversal of 531216730 is 37612135.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38089 + ... + 50131.

It is an arithmetic number, because the mean of its divisors is an integer number (32681394).

Almost surely, 2^531216730 is an apocalyptic number.

531216730 is a deficient number, since it is larger than the sum of its proper divisors (514587878).

531216730 is a wasteful number, since it uses less digits than its factorization.

531216730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12462.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 531216730 is about 23048.1394042990. The cubic root of 531216730 is about 809.8860430041.

Adding to 531216730 its reverse (37612135), we get a palindrome (568828865).

The spelling of 531216730 in words is "five hundred thirty-one million, two hundred sixteen thousand, seven hundred thirty".